Hi there i need help with these questions

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 20%. You would like to be 90% confident that your estimate is within 1% of the true population proportion. How large of a sample size is required? n = 4330 A fitness center is interested in finding a 98% confidence interval for the mean number of days per week that Americans who are members of a fitness club go to their fitness center. Records of 263 members were looked at and their mean number of visits per week was 3.5 and the standard deviation was 1.8. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a 79 distribution. ? b. With 98% confidence the population mea imber of visits per week is between and visits. Z c. If many groups of 263 randomly selected members are studied, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean number of visits per week and about percent will not contain the true population mean number of visits per week. You are interested in finding a 90% confidence interval for the mean number of visits for physical therapy patients The data below show the number of visits for 14 randomly selected physical therapy patients. Round answers to 3 decimal places where possible. 18 9 16 12 24 23 23 21 20 19 27 23 a. To compute the confidence interval use a ?v distribution. b. With 90% confidence the population mean number of visits per physical therapy patient is between and visits. c. If many groups of 14 randomly selected physical therapy patients are studied, then a different confidence intery would be produced from each group. About percent of these confidence intervals will contain the percent will not contain the true true population mean number of visits per patient and about population mean number of visits per patient. The body temperatures in degrees Fahrenheit of a sample of adults in one small town are: 99.1 98.4 98.1 99.9 97.3 97.1 98.7 99.5 Assume body temperatures of adults are normally distributed. Based on this data, find the 95% confidence interval the mean body temperature of adults in the town. Enter your answer as an open-interval (i.e., parentheses) accurate 3 decimal places. Assume the data is from a normally distributed population. 95% C.I. = (97.681,99344) Preview Label the number line with the following coordinate: 2. -3 2 Clear All Draw: Label the number line with the following coordinate